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J. F. OTT 8v A. E. KENNELLY.

ELBGTRIG METER. No. 479,171. Patented July 19, 1892.

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(Nol Model.) 3 Sheets-,Sheet 2.

J F. OTT 8v A. E. KENNELLY.

ELBGTRIG METER.

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(No Model.) 3 Sheets-Sheet 3. J. P. OTT 8v 11-13. KBNNELLY.

ELECTRIC METER.

No. 479,171. Patentd July 19, 1892.

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UNITED STA-TES PATENT OFFICE.

JOI-IN F. OTT AND ARTHUR E. KENNELLY, OF ORANGE, NET/V JERSEY, ASSIGN- ORS TO-THE EDISON GENERAL ELECTRIC COMPANY, OF NEW YORK, N. Y.

ELECTRIC METER.

SPECIFICATION forming part of Letters Patent No. 479,171, dated July 19, 1892.

Application tiled September 7, 1891. Serial No. 405,051. (No model.)

.To a/ZZ whom it may concern:

Be it known that we, JOHN F. OTT, a citizen ofthe United States, and ARTHUR E. KEN- NELLY, a subject of t-he Queen of Great Britain, residing at Orange, in the county of Essex and State of New Jersey, have invented a certain new and useful Improvement in Meters, of which the following is a specification.

1o The present invention relates to that class of electrical meters in which suitable recording or indicating counters are moved forward at frequent intervals by a clockwork or motor mechanism, the extent of movement of the counters depending on the strength of the current in the circuit at the moment when mechanism is brought into operation to move said counters.

The main objects of the invention are to provide a simple and practicable mechanism for advancing the counters at each operation a distance exactly dependent on and corresponding to the current strength and then to disengage the driving mechanism from the z 5 meter and to provide a double meter-that is, one having two recorders or indicators--the purpose being to adapt the meter for use in a three-wire system.

In the accompanying drawings, Figure 1 is a front view of the meter, the face of the inclosing case being removed. Fig. 2 is a side view at right angles to Fig. 1, the side of the case being removed. Fig. 2 is a detail of driving mechanism. Fig. 3 is a plan view of 3 5 Fig. 2, the top of the case and the magnetimmediately below the top being removed; and Fig. 4 is a diagram of the circuits.

As already indicated, the meter, preferably, is a double one. One part only, however, need be described in detail, since the other part is of the same construction.

Referring to Figi, 1 isa box or case,within which is any suitable arrangement of mechanism for advancing the hands or pointers 2 over their respective dials, which are graduated to indicate the desired electrical measurements. From the rear of this case projects a shaft 3, (see Fig. 2,) at the end of which is a small driving-wheel 4, adapted to gear with a crown-wheel 5, and connected by spring S and by pin p, movable in notch n to shaft 3. The wheel 5 is mounted on a sleeve 6, which carries a second similar wheel or engaging device 7 and which is adapted to move up and down on the spindle 8. When the parts are in the position shown, 7 operatively connects the hand 25 and the motor, they being normally disconnected. On the sleeve is a disk 9, having a rim 10, in which at intervals of ninety degrees are notches with carn- 6o faces 11. This disk is provided with depending pins 12, which bear against the anti-friction rollers 13 on the cross-bar 14, which is secured to the spindle 8, so as to turn with it.

l5 is a spring, at the end of which is a 65 roller which is pressed down on the outer face of the disk 9. l

16 is a sliding bolt, one end of which carries an anti-friction roller 16', which bears against the rim 10 and which is adapted to 7o enter the cam -notch v11 when said notch comes in line with the bolt.

17 is a spindle provided with a rigid arm 18 and a pin 19 at one end and having at the other end a retracting-arm 20, (see Fig. 3,) which engages with a pin 21 on the bolt 16.

22 is aspring, which tends to throw thebolt forward.

23 is a large permanent magnet, between the poles of which, is a coil 24, freely sus- 8o pended in a manner well understood in the construction of deflecting galvanometers and similar instruments, through which coil the vcurrent to be measured is passed. This coil moves a hand or pointer 25, one end of which normally stands immediately behind the pin 19, away from the pin to a greater or less extent, depending on the strength of the current in the coil. 'This pointer stands above the wheel 7 and out of engagement withit, 9o except when the wheel 5 is in gear with the wheel 4c, when the tooth 25', carried by the l pointer, will be in engagement with wheel 7. During such time, since the sleeve 6, carrying the wheels 5 and 7, is elevated bythe end 95 of the bolt 16 riding on the edge of the flange 10, the pointer 25 will rest between two teeth in the wheel 7, and by rotation of said wheel will be carried back toward its original position. roo

2G is a clockwork or motor mechanism ot any suitable construction, and which need not be described in detail. As shown in Figs. l and 3, said mechanism is provided with two spring-drums and winding mechanisms, although this is evidently not essential.

27 is a spindle adapted to receive an ordinary key for winding. This motor mechanism drives the spindle S, which extends from the wheel 7 in the upper part of the apparatus to the wheel 7 in the lower part, at a constant and definite speed,the motor being regulated by a suitable escapement 2S.

29 is a coil oi coarse wire directly in the main circuit, the coil 2t being in a shunt around it. The coil 29 serves, merely, as a resistance to divert a predetermined fraction of the current through coil 24.

30 is a light helical spring tending to hold the coil 24c and pointer 25 at Zero position.

The reference-numerals, so far as applied to the lower parts of the meter, correspond to those used in the upper part.

In Fig. Ll, 3l is one ofthe leads of a threewire system, and 32 is the other lead, 33 being the neutral wire. 34C are translating devices. 23, 24:, and 29 are magnets and coils, such as already described in connection with the other iigures.

The operation of this meter has already been partially indicated, but will now be set forth in full. Suppose all ot the translating devices to be out of use. The motor will be running, but will have no ei'tect on the recorder or indicator, since when the wheels 4i and 5 are thrown into gear by operation of a cam 11 and pointer 25 is engaged by a tooth ot wheel 7 said pointer immediately moves pin 19, withdrawing the bolt 1G and disengag ing the gear-wheels. If now the circuit be closed, say, through one-half the lamps between conductor 3l and the neutral conductor 33, the coil 2i and pointer25 will be deflected through an are corresponding to the current required to supply said translating devices, and when the wheels 5 and 7 are raised by operation ofthe cani 1l and bolt 1G the pointer 25 will be engaged by the tooth of the wheel 7 at a considerable distance from the pin 19. The rotation ot' said wheel 7 will carry the pointe-r along until it (the pointer) reaches its zero position, when it strikes the pin, moving it and turning the spindle 17, and by means of the arm 2O withdrawing the trip or bolt 16, immediately allowing the spring 15 to return the sleeve G and connected parts to their original position, disengagin g gear-wheels 4 5, and stopping further movement of the recorder until the wheels are again putin engagement by a succeeding cam ll. This second movement will be just equal to the first, provided the pointer has been moved around to the same extent by the current-that is, provided the same number of translating devices are in use. Butsuppose all ofthe translating devices between conductors 3l and 33 are now in circuit the pointer will be thrown around approximately twice as far, so that when the wheels are thrown into gear, as already described, the pointer will be carried twice as far before it strikes pin 19 and operates the trip to disengage the gearing. Thus it will be seen that the length oi' time during which the recorder advances at each operation depends directly on the operation of the trip, and the time at which that is withdrawn at each operation depends on the distance which the pointer has been moved by the current. It now somo of the translating devices 35 are thrown into circuit, the lower coil and pointer will be dedected and will operate on the lower recording device in precisely the same manner as above set forth and in exact correspondence to the number of translating devices in circuit.

l. The combination, in an electrical meter, of a recording device, a regulated motor adapt ed to advance said recording device when in engagement, mechanism operated by said regulated motor for throwing the motor and recording device into engagement at intervals, and a trip comprising a hand or arm moved in one direction by the current, an engaging wheel or device driven by the motor and operatively connecting the hand and motor when the motor and recorder are in engagement, whereby the hand is carried backward through the same distance by the motor for disengaging said parts when they have moved a distance corresponding to the strength of the current, substantially as described.

2. The combination,in an electrical meter, of a recorder, a motor mechanism adapted to advance said recorder when in engagement, a cam for throwing the same into engagement at intervals, and a tripping device consisting of a pointer moved in one direction by the coil through which the current to be measured passes and moved in the opposite direction by the motor, and a retracting-lever moved by said pointer, substantially as described.

3. The combination, in a meter, of a recorder, a wheel for advancing it, a rotating wheel movable into and out of gear therewith, a motor and mechanism operated thereby for moving said wheels into engagement at regular intervals, a hand or pointer normally free to move, a coil to which said pointer is connected and through which the current to be measured lows,an.d means for engaging said pointer when the wheel is engaged and moving it, and a trip operated by means of said pointer to disengage the wheels, substantially as described.

et. The combination, in a meter, of a recording or indicating device, a motor and means operated by said motor for periodically throwing it into engagement with the recorder or indicator, a hand or pointer and coil, through which coil the current to be measured passes, said hand being operatively connected CIJ ICO

IIO

to the motor so as to be moved thereby when the motor and recorder are in engagement, the hand not being normally operatively connected to the motor, and a trip operated through said pointer for disengaging the motor from the recorder or indicator, substantially as described.

5. The combination, in a meter, of a recorder, a driving-wheel Etherefor, a clockwork or motor, a gear-wheel driven thereby, mechanism operated by said motor for moving said wheel into and out of engagement with said driving-Wheel, a hand or pointer adapted to be moved by the current through a distance exactly corresponding to the strength of the current, thehand being normallydisconnected from the motor, a moving part driven by the motor and adapted to connect the hand and motor, said parts being in operative position when the motor and recorder are in engagement, and a tripping device for disengaging the motor from the recorder, said trip being operated through the hand or pointer, substantially as described.

6. The combination of the recorder, the motor, the motor-shaft,the gear-Wheels and cam movable longitudinally thereon, the bolt cooperating with said cam to move said parts in one direction, and thetrippin g device comprising a hand or pointer, an operating-coil, and a retractor for the bolt in position to be 0perated by or through the hand or pointer, substantially as described.

7. The combination of the recorder, the motor, the motor-shaft, the gear-wheels and cam movable thereon, the spring for moving said tractoror the bolt in position to be operated by or through the hand or pointer, substan' tially asdescribed.

8. The combination, in a meter, of a recording device having a driving-Wheel, a motor, a wheel driven by the motor, means for moving said wheel into gear with the drivingwheel, consisting of a disk having cam-faces, a sliding bolt pressing against the rim of said disk, but adapted to move lengthwise when a oam-notchis broughtin linewithitand to move the cam and connected parts forward, and a tripping device comprising a hand or pointer, an operating-coil, and a retractor for the bolt in position to be operated by or through the hand or pointer, substantially as described. y, 9. The combination, in an electrical meter, of two recording devices with driving-Wheels therefor, a single clockwork or motor for operating both recorders, gear-wheels movable into and out of gear with the driving-Wheels, mechanism operated by the motor for moving the same, and trips the operation of which is dependent on the current nsed for disengaging the Wheels, substantially as described.

This specication signed and witnessed this 28th day of August, 1891.

JOHN F. OTT.

ARTHUR E. KENNELLY.

Witnesses:

CHARLES M. CATLIN, JOHN F. RANDOLPH. 

